
2001 Microchip Technology Inc.
Advance Information
DS39541A-page 117
PIC18C601/801
FIGURE 9-12:
RF5:RF3 PINS BLOCK DIAGRAM
FIGURE 9-13:
RF7:RF6 PINS BLOCK DIAGRAM
External Enable
CS Out
Drive System
System Bus
Control
Data Bus
WR LATF
WR TRISF
RD PORTF
Data Latch
TRIS Latch
RD TRISF
I/O pin(1)
Q
D
CK
Q
D
CK
EN
QD
EN
RD LATF
or
PORTF
0
1
Port
Data
Note 1: I/O pins have diode protection to VDD and VSS.
WM = ’01’
UB/LB Out
Drive System
System Bus
Control
Data Bus
WR LATF
WR TRISF
RD PORTF
Data Latch
TRIS Latch
RD TRISF
I/O pin(1)
Q
D
CK
Q
D
CK
EN
QD
EN
RD LATF
or
PORTF
0
1
Port
Data
Note 1: I/O pins have diode protection to VDD and VSS.